SKILL

Follow the TDD London School (mock-first) approach:

1. Write the failing test first -- define expected behavior with mocked dependencies
2. Run the test -- confirm it fails for the right reason
3. Implement minimal code -- make the test pass with the simplest solution
4. Refactor -- clean up while keeping tests green
5. Repeat -- add the next behavior

Before starting: mcp__claude-flow__hooks_pre-task({ description: "TDD: FEATURE_NAME" }) After completing: mcp__claude-flow__hooks_post-task({ taskId: "tdd-FEATURE", success: true, storeResults: true })

Principles:

• Mock external dependencies at boundaries
• Test behavior, not implementation
• One assertion per test when possible
• Descriptive names: should [behavior] when [condition]